did my anchor slip? GPS attached

[Exonerated]

I'm attaching a screenshot ("three-am.png") of my GPS tracks while anchored. The track begins on the left when we went to bed (at around low tide). I took the screenshot about 20 minutes after waking up and seeing that the boat had swung to a new spot. To the right (underneath the "ance" in "Distance") is what looks like the circular arc of the boat swinging at its maximum distance from the anchor. But then we have a new arc about 10 ft further out (to the right) from the anchor (under the "H" in "Heading").

I'm wondering: Did the anchor slip (and then recatch) between those two arcs on the right?

My best guess right now is no: It seems more likely that what looks like the arc of a maximally stretched anchor line is actually just the boat drifting a bit inside of the anchor's circle, and/or maybe the wind picked up little to straighten out the anchor line between the two arcs (although I didn't notice any change to the very light wind). But I'm interested in what others think.

More context:

We have 9 ft tides here and are in about 14 ft of water at low tide, which was around when the track begins in the left. I took the screenshot at almost high tide. I think we had put out about 140 ft of anchor line (almost all rope). I set the anchor by running the engine in reverse at medium RPMs for a minute or so. This spot is well known to have great holding.

I wasn't using an "anchor watch" app. It seems like the alarm would be quite prone to false positives, and I don't want to wake up my spouse unnecessarily. Instead I've been looking at the GPS track whenever I woke up a little, and sometimes popping my head out the hatch to look around. At home I'm a sound sleeper, but on the boat I naturally wake up every hour or two to check on where we are. I think next time I'll add the anchor watch app to my arsenal, but just use a setting that will only wake us up if something's definitely wrong (and/or use vibrate-only, so it's more likely to wake up me and not my spouse).

We didn't actually have any issues. (I'm also attaching a screenshot of our track from the rest of the night. The track going off the screen is from when we picked up the anchor and left.) But the worry kept me from getting as much sleep as I would have otherwise. This is only my second time sleeping on an anchor on a boat that I'm responsible for, so I'd love to have any opinions/advice that folks can give.